US3691447A - Device for feeding objects between two points - Google Patents

Device for feeding objects between two points Download PDF

Info

Publication number
US3691447A
US3691447A US75946A US3691447DA US3691447A US 3691447 A US3691447 A US 3691447A US 75946 A US75946 A US 75946A US 3691447D A US3691447D A US 3691447DA US 3691447 A US3691447 A US 3691447A
Authority
US
United States
Prior art keywords
stepping motor
steppable
steps
contacts
stepping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US75946A
Other languages
English (en)
Inventor
Gottfried Sperandio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3691447A publication Critical patent/US3691447A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/27—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an absolute digital measuring device

Definitions

  • the invention solves the problem in such a way that,
  • the object is moved a predetermined number of steps by a driving device using an electric drive stepping motor in such a way that the number of steps can be determined by an electromechanical comparison device featuring presetting of steps and being accurately definable in any position and that the driving mechanism can be switched by the same.
  • the device has the great advantage that it can be accurately defined at any time how many steps the drive stepping motor has actually performed.
  • An additional factor is that in the event of power failure or upon stoppage of the machine it is possible to continue working immediately fromthe same place, that means continuing from the already performed number of steps of the drive stepping motor.
  • This is indispensable in practice, for example in the setting up and operation of machine tools or in optical measurement engineering or for adjusting parabolic mirrors of ground stations or the like.
  • the comparison device consists of a comparing stepping motor and a position measuring device which is driven by the same.
  • both stepping motors can be fed from the same step voltage transmitter. It is, however, also possible that the position measuring device in the comparison device can be preset proportional to the number of steps for the drive stepping motor. This would mean that the stepping motor is driven in a reduction ratio or a transmission ratio relative to the object.
  • comparison device through the driving device, gives commands to the drive stepping motor.
  • the position measuring device can exist of a contact plate which is provided with brush tapping. According to the mathematical functions contacts are provided on the contact plate which are tapped by a brush device.
  • the position measuring device is provided with a quickly interchangeable punched card, through the holes of which, as is generally known, brushes touch a contact device.
  • the device has the great advantage that a rigorously correct feeding of objects between two points is possible on a straight or a curved path also in several coordinates or in several working devices at one object.
  • the device operates accurately even if the entire equipment is occasionally stopped or if power supply is interrupted or if other troubles occur in the plant.
  • a schematic representation of the device in a block diagram shows the arrangement and cooperation of the individual assemblies.
  • the device for advancing a movable member 4 between two points is represented in the block diagram, the driving device 1 and the electromechanical comparison device 2 being bordered by a dotted line.
  • the driving device 1 comprises a power supply 19 which is connected to the control device or indexer 20 through line 11. Through line 13 the control device 20 feeds the drive stepping motor 3 which can, through a mechanical coupling 16, shift the member 4 from point 17 to point 18.
  • the shifting movement as an example, is shown in the direction of arrow 5. In the present case it is linear shifting.
  • the shifting movement can, also be along a curved path.
  • control device 20 drives the comparison stepping motor 6 which drives through a mechanical coupling 15 a collector arm 8 carrying, for
  • the collector arm 8 with the brushes 9 slides over the I contact plate 7 which carries, for example, metal conparison device can be provided with several'comtacts 10, which connect the brushes 9 through a selected contact to a battery according to the circuit arrangement used.
  • the contact plate 7 is rotatable by its handle 21 to connect the selected contact to the battery and thus select the desired number of steps.
  • the circuit arrangement can be selected according to requirements, it being possible to have brushes and contacts so arranged on the contact plate that, for instance, steps lcan be tapped.
  • the circuit arrangement is sufficiently known in practice and is not object of the invention. This applies also to the control device 20 which includes one or several step voltage transmitters for driving the stepping motors 3 and 6.
  • the control device 20 as such is a shelf item and not essential to the invention. For example, so called slow-syn indexer number 2SP l80OX-4 manufactured by Superior Electric Co., Bristol, Conn. 06010 could be used.
  • the two stepping motors 3 and 6 perform the same angular steps which are always identical in frequency and number.
  • the electromechanical plate 7 is adjustable by the lever 21, for example in several directions as shown by the double arrow to select the desired number of steps by connecting the respective contact to the battery.
  • the control device may drive several stepping motors, for example, for controlling movements in several coordinates or in a time coordinate. In this way it is possible to perform with one control device for example at a machine tool or at some other equipment, a multiple control.
  • the device according to the invention has the great advantage that even in the case of power failure and voltage fluctuations an accurate control of the moveable member 4 is possible from any point of the movement at any time.
  • the contact plates 7 may, for example, be replaced by a punch card whereby the brush 8 would scan the holes in the punched card.
  • the brush 8 could be replaced by photoelectric, magnetic, or by any other suitable scanning means such as a particle radiator.
  • a known indexing control means 20 drives indexable motors
  • the improvement comprising a first stepping motor 3, means 3 for connecting sai first stepping motor to said indexing control means, coupling means 16 for coupling the first stepping motor 3 to said movable member 4, a second stepping motor 6, means 12 for connecting the second stepping motor 6 also to said indexing control means whereby said first and second stepping motors are stepped in synchronism with each other, a comparing plate 7 carrying a plurality of contacts 10, means 21 for adjusting the comparing plate to a preselected position whereby one of said plurality of contacts in connected to a source of power to represent the preselected number of steps, steppable sensing means 8, means 15 for coupling said steppable sensing means to said second stepping motor 6 conductor means 14 for connecting said steppable sensing means to said indexing control means whereby the latter is stopped when said steppable sensing means come

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)
  • Control Of Stepping Motors (AREA)
US75946A 1970-07-09 1970-09-28 Device for feeding objects between two points Expired - Lifetime US3691447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2034003A DE2034003C3 (de) 1970-07-09 1970-07-09 Vorrichtung zur Positionierung eines mittels Schrittmotors angetriebenen Gliedes einer Maschine

Publications (1)

Publication Number Publication Date
US3691447A true US3691447A (en) 1972-09-12

Family

ID=5776215

Family Applications (1)

Application Number Title Priority Date Filing Date
US75946A Expired - Lifetime US3691447A (en) 1970-07-09 1970-09-28 Device for feeding objects between two points

Country Status (6)

Country Link
US (1) US3691447A (de)
AT (1) AT311150B (de)
CH (1) CH513464A (de)
DE (1) DE2034003C3 (de)
FR (1) FR2105804A5 (de)
GB (1) GB1310187A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3123613B1 (fr) 2021-06-02 2023-04-21 Psa Automobiles Sa Procédé et système pour authentifier un dispositif de commande à distance portable utilisable pour démarrer un véhicule automobile

Also Published As

Publication number Publication date
AT311150B (de) 1973-09-15
DE2034003B2 (de) 1973-06-07
CH513464A (de) 1971-09-30
DE2034003A1 (de) 1972-01-13
DE2034003C3 (de) 1974-01-03
GB1310187A (en) 1973-03-14
FR2105804A5 (de) 1972-04-28

Similar Documents

Publication Publication Date Title
US3218532A (en) Numerically controlled positioning system
US3323030A (en) Digital fine and coarse servo motor control system
GB1481739A (en) System for numerical control of a machine tool
US3686547A (en) Numerical fine-coarse positioning control system
US3262105A (en) Condition responsive electrical system
US2887638A (en) Control system for automatic machine tools
US2944737A (en) Improvements relating to control systems for automatic machine tools
US3427518A (en) Digitally controlled positioning device
US3209222A (en) Discrete signal electrical positioning control system
US3691447A (en) Device for feeding objects between two points
US3612976A (en) Position control system
US3410177A (en) Apparatus for providing a command signal for a servoactuator
US3384797A (en) Positioning apparatus with controls employing resistor increments
US3944902A (en) Point by point positioning apparatus
US3297929A (en) Tape programmed machine tool control system
US3284618A (en) Nominal value position control system
US3806788A (en) Drive apparatus for machine tool feed motors
US3035216A (en) Angle and arcuate position control system
US2929555A (en) Automatic control mechanism and interpolating devices therefor
US3648244A (en) Readout system for selective display of digital data on time-shared conductors
US4059788A (en) Device for automatically controlling an electroerosion cutting machine
US3427519A (en) System for automatic control of movement of a movable structure through a preselected length of its displacement path
US3350966A (en) Automatic digital tool-setting system
US3013195A (en) Servomotor control system
US3659174A (en) Machine for performing operations consecutively at preselected working positions